This product is either discontinued or we cannot get that from suppliers.
Three SAS 12Gb/s 4x wide port (SFF-8644), 16 x 3.5"/2.5" SAS 12Gbps/6Gbps hard drive, or 2.5" SAS SSD; lockable tray, 0- 40?C, 5~95% RH non-condensing, wet bulb: 27?C, 344.19 W, Sound pressure (LpAm): 53.5 dB(A), Redundant/ Hot Swap ATX Power Supply, 450W, 90-240Vac~, 50-60Hz.
The EJ1600 v2 expansion enclosure is designed for expanding the storage space on a QNAP Enterprise ZFS NAS by connecting multiple expansion enclosures via high-speed mini SAS cables.